A week of snowfall in the Treasure Valley will end Friday and be replaced with partly sunny skies and colder than normal temperatures through the weekend — residents should prepare for overnight lows that flirt with 0.

Arctic air from Canada is expected to push out the systems which have been dropping snow over Boise for the last few days by late Friday afternoon, according to National Weather Service reports.

After that, expect partly sunny skies, with high temperatures in the low-to-mid 20s during the day and single digit lows overnight for the next week or so, since there won’t be clouds to keep the heat in.

The average high temperatures for the second week of January in Boise are in the mid-30s and lows are usually in the mid 20s, so it should be unseasonably cold.

The estimated low temperature for the Boise area Saturday morning is 1 degree, according to National Weather Service reports. Treasure Valley residents should also prepare for a winter inversion to return by early next week, where warmer air will keep colder air trapped on the ground.

Traffic conditions were slippery during the Friday morning commute but there were only a handful of minor traffic crashes in Ada and Canyon counties through 9 a.m., according to sheriff’s dispatchers and Idaho State Police officials.

Winter recreationists got some good news Friday. Bogus Basin Ski Resort officials say the mountain got almost 10 inches of new snow since Thursday and the Superior Express high speed chairlift on the back side of the mountain will open for night skiing for the first time Friday.

Officials with Brundage Mountain Resort near McCall say the mountain got a foot of new snow over the last few days as well.